Share Capital - Summary of PSU Activity (Details) - Performance Shares [Member] - $ / shares	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Number of Units, Beginning balance	210,000
Number of Units, Granted	96,550	210,000
Number of Units, Forfreited	(49,100)
Number of Units, Ending balance	257,450	210,000
Weighted Average Grant Date Fair Value, Beginning balance	$ 43.9
Weighted Average Grant Date Fair Value, Granted	35.28	$ 43.9
Weighted Average Grant Date Fair Value, Forfeited	44.17
Weighted Average Grant Date Fair Value, Ending balance	$ 40.61	$ 43.9

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Xenon Pharmaceuticals Inc. 10-K